ref(apply): Remove unwrap in the apply loop (#368)

Author: iambriccardo

etl/src/replication/apply.rs

@@ -554,7 +554,11 @@ where
             // Table sync workers signal when they complete initial data copying and are ready
             // to transition to continuous replication mode. Guard the branch so it stays
             // dormant if no signal receiver was provided.
-            _ = force_syncing_tables_rx.as_mut().unwrap().changed(), if force_syncing_tables_rx.is_some() => {
+            _ = async {
+                if let Some(rx) = force_syncing_tables_rx.as_mut() {
+                    let _ = rx.changed().await;
+                }
+            }, if force_syncing_tables_rx.is_some() => {
                 // Table state transitions can only occur at transaction boundaries to maintain consistency.
                 // If we're in the middle of processing a transaction (remote_final_lsn is set),
                 // we defer the sync processing until the current transaction completes.